Medical apparatus

ABSTRACT

A medical apparatus, including a clamp, a work head and a handle. The work head is connected to the clamp and the handle and includes: a casing, a firing forcing member, a firing rod connected to the firing forcing member, a receiving cavity arranged at a side of the firing rod, and a clip-cartridge assembly; the clip-cartridge assembly being arranged in the receiving cavity and configured for delivering ligation clips to the clamp. An inner cavity communicating with the receiving cavity is formed in the casing. The firing rod is connected to the firing forcing member and the clamp respectively, and the firing forcing member drives the firing rod to move so as to open or close the clamp. The medical apparatus further includes a limiting member, the limiting member being configured for preventing at least one of the clip-cartridge assembly and/or a driving assembly from exceeding a stroke range.

CROSS REFERENCE TO RELATED APPLICATION

This application claims the priority of Chinese Patent Application No.201811449486.1 filed on Nov. 30, 2018, the entire contents of which arehereby incorporated by reference.

TECHNICAL FIELD

The present disclosure relates to a medical apparatus, belonging to thetechnical field of medical apparatus.

BACKGROUND

In order to fully expose the surgical visual field during the surgicalprocedure, it is necessary to ligate the blood vessels around targettissue to arrest bleeding. Hemostasis has become one of the basicsurgical operations. Surgical operations in any part of the human bodyinvolve bleeding and hemostasis, basically without exception. Generally,a clip applicator for ligation clips is available for performinghemostasis. However, current clip applicator doesn't have or only have asimple preoperative safety device, so there is a possibility thatcomponents exceed the stroke range during an operation. If a componentexceeds the stroke range during surgery, problems such as false firingmay occur, thus increasing operational risk.

SUMMARY

The purpose of the present disclosure is to provide a medical apparatus,which has higher safety factor, reduced operational risk, a simplestructure, and convenient operation.

In order to achieve the above-mentioned purpose, the present disclosureprovides the following technical solutions: a medical apparatus,comprising a clamp, a work head and a handle, wherein the work head isconnected to the clamp and the handle, and the work head comprises acasing, a firing forcing member arranged in the casing, a firing rodconnected to the firing forcing member, a receiving cavity arranged at aside of the firing rod, and a clip-cartridge assembly, theclip-cartridge assembly being arranged in the receiving cavity andconfigured for delivering ligation clips to the clamp; an inner cavitycommunicating with the receiving cavity is formed in the casing; thefiring rod is connected to the firing forcing member and the clamprespectively, and the firing forcing member drives the firing rod tomove so as to open or close the clamp; and the medical apparatus furthercomprises a limiting member, the limiting member being configured forpreventing the clip-cartridge assembly at least one of a drivingassembly from exceeding a stroke range.

Further, the limiting member comprises a threaded rod arranged on thedriving assembly, the threaded rod is connected to the clip-cartridgeassembly through a connecting piece, and the threaded rod is in threadedconnection with the connecting piece; and the driving assembly drivesthe threaded rod to push the connecting piece so as to drive theclip-cartridge assembly to feed; in condition that the driving assemblydrives the threaded rod beyond the stroke range, the medical apparatusstops working.

Further, the limiting member comprises an electronic switch arranged onthe clip-cartridge assembly and a receiver, the receiver is arranged inthe inner cavity and coupled with the electronic switch; in conditionthat the receiver receives a signal from the electronic switch, themedical apparatus stops working.

Further, the limiting member comprises a first stopper disposed on thecasing at a side of the inner cavity, a second stopper disposed in theinner cavity, and a second bump; the second bump is disposed on theclip-cartridge assembly and clamped with the second stopper; the secondbump is located between the first stopper and the second stopper; incondition that an end of the clip-cartridge assembly abuts against thefirst stopper or the second bump abuts against the second stopper, themedical apparatus stops working.

Further, the clip-cartridge assembly comprises the ligation clips, aclip-cartridge slot configured for accommodating the ligation clips, anda clip-pushing piece covering the clip-cartridge slot; the clip-pushingpiece is provided with a plurality of ratchet facing towards the clamp,and the ratchet abut against the ligation clips to push the ligationclips to move towards the clamp under driving of a driving rod.

Further, the medical apparatus further comprises a driving rod arrangedon the clip-cartridge assembly to push the clip-pushing piece to move, aclip-pushing forcing member is arranged on the handle, and theclip-pushing forcing member is connected to the driving rod and drivethe driving rod to push the clip-pushing piece to move.

Further, a positioning block is arranged in the inner cavity, thedriving rod is provided with a clamping part, and the positioning blockcooperates with the clamping part to restrict the driving rod frommoving towards the clamp.

Further, the driving rod comprises a main body part and a bending partbent outwards from a side of the main body part, the clamping partcomprises a latching hook arranged on the bending part and a first bumparranged on the main body part, and the positioning block is arrangedbetween the latching hook and the first bump.

Further, the firing forcing member comprises a toggle piece and amovable member, and the toggle piece has a first connecting part, asecond connecting part, and a third connecting part; the firstconnecting part is axially connected to the casing, the secondconnecting part is connected to the connecting rod, the third connectingpart is connected to the movable member; the positioning block isclamped with the toggle piece; and in condition that the positioningblock moves forwards, the toggle piece rotates towards the clamp throughthe first connecting part to drive the firing rod to control the clampto open; and in condition that the positioning block moves backwards,the toggle piece rotates towards the handle through the first connectingpart to drive the firing rod to control the clamp to close.

Further, a guide groove is formed in the casing, and the movable memberis disposed in the guide groove.

Further, the movable member comprises a spring and a spring rod, thespring is fixedly arranged in the guide groove and configured forrestoring the toggle piece, the spring rod is arranged in the spring;and an end of the spring rod is connected to the toggle piece, and theother end of the spring rod abuts against the spring.

The present disclosure has the following beneficial effects: thestructure is simple and operation is convenient; by constructinglimiting protections, the medical apparatus has higher safety factor,and the probability of failure due to occurrence of a single fault iseffectively reduced, thus lowering operational risk.

By allowing the positioning block to be clamped with the toggle piece,the firing rod is driven to move forwards or backwards so as to controlthe opening or closing of the clamp, thereby achieving the purposes ofstructure simplification, quick firing and efficiency improvement.

The above-mentioned description is only an overview of the technicalsolution of the present disclosure. In order to understand the technicalmeans of the present disclosure more clearly and implement it accordingto the contents of the specification, the preferred embodiments of thepresent disclosure will be described in detail below in conjunction withthe accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of an overall structure of a medicalapparatus provided in the present disclosure.

FIG. 2 is a schematically structural diagram of a clip-cartridgeassembly in FIG. 1.

FIG. 3 is a schematically structural diagram of a ligation clip in FIG.2.

FIG. 4 is a schematically sectional view of a medical apparatus of thepresent disclosure.

FIG. 5 is another schematically sectional view of a medical apparatus ofthe present disclosure.

FIG. 6 is a schematically structural diagram of a driving assembly inFIG. 4.

FIG. 7 is a schematically structural diagram of a connecting assembly inFIG. 4.

DETAILED DESCRIPTION

The specific implementation modes of the present disclosure will bedescribed in further detail with reference to the drawings andembodiments. The following embodiments serve to illustrate the presentdisclosure, but are not intended to limit the scope of the presentdisclosure.

Referring to FIGS. 1 to 7, a medical apparatus in a preferred embodimentof the present disclosure includes a clamp 3, a work head 2, and ahandle 1. The work head 2 is connected to both the clamp 3 and thehandle 1. The work head 2 includes a casing 10, a firing forcing memberarranged in the casing 10, a firing rod 21 connected to the firingforcing member, a receiving cavity 22 arranged at a side of the firingrod 21, and a clip-cartridge assembly 23 arranged in the receivingcavity 22 and configured for delivering ligation clips 231 to the clamp3. The firing rod 21 is connected to the firing forcing member and theclamp 3 respectively, and the firing forcing member drives the firingrod 21 to move so as to open or close the clamp 3. An inner cavity 11communicating with the receiving cavity 22 is formed in the casing 10,and the casing 10 has an opening 12 formed at a side of the inner cavity11. The clip-cartridge assembly 23 passes through the inner cavity 11via the opening 12 to be inserted into the receiving cavity 22. A cover13 connected to the opening 12 is further disposed on the casing 10, andthe cover 13 is opened or closed relative to the opening 12.

The clamp 3 includes a movable jaw 31 and a fixed jaw 32, the movablejaw 31 is connected with the fixed jaw 32 by a rotating shaft 33, andthe firing rod 21 is connected to the rotating shaft 33. The firing rod21 moves forward or backward to control the opening or closing of themovable jaw 31 relative to the fixed jaw 32.

The clip-cartridge assembly 23 includes ligation clips 231, aclip-cartridge slot 232 configured for accommodating the ligation clips231, and a clip-pushing piece 233 covering the clip-cartridge slot 232.The clip-pushing piece 233 is provided with a plurality of ratchetfacing towards the clamp 3, and the ratchet abut against the ligationclips 231 to push the ligation clips 231 to move towards the clamp 3under the driving of a driving rod 26. Each ligation clip 231 includes afirst clip arm 2311, a second clip arm 2312, and a connector 2313configured for connecting the first clip arm 2311 and the second cliparm 2312. Each first clip arm 2311 is further provided with a protrusion2314. The protrusion allows the ratchet to abut thereon, so as to pushthe ligation clip 231 to move in the clip-cartridge slot 232 and movetowards the clamp 3. The protrusion 2314 is in a shape of cylinder andis arranged at an end, away from the connector 2313, of the first cliparm 2311. The ligation clip 231 is moved in the clip-cartridge slot 232along a moving direction, and the protrusion 2314 has an inclinedsurface extending along the moving direction of the ligation clip 231.When the clip-pushing piece 233 feeds the clips, the ratchet abutagainst the protrusion 2314 to push the ligation clips 231 towards theclamp 3. When the clip-pushing piece 233 retracts, due to that theinclined surface of the protrusion 2314 gradually inclines downwardsfrom the direction of the clamp 3, the ratchet will not interfere withthe ligation clips 231 when the ratchet retracts together with theclip-pushing piece 233, and the positions of the ligation clips 231remain unchanged.

The medical apparatus further includes a driving rod 26 arranged on theclip-cartridge assembly 23; a clip-pushing forcing member is furtherarranged on the handle 1, and the clip-pushing forcing member isconnected to the driving rod 26, so as to drive the driving rod 26 topush the clip-pushing piece 233 to move. The clip-pushing piece 233 isdisposed on the clip-cartridge slot 232 and connected to theclip-pushing piece 233. In the embodiment, one end of the clip-pushingpiece 233 is provided with a mounting part 2331, and the driving rod isconnected to the clip-pushing piece 233 through the mounting part 2331.

A brake member 27 is detachably arranged between the driving rod 26 andthe clip-cartridge assembly 23 to limit the relative movement betweenthe driving rod 26 and the clip-cartridge assembly 23. A side of theclip-cartridge slot 232 is provided with a bending piece 2321, and thedriving rod 26 has an abutting surface facing away from the clamp 3. Thebending piece 2321 abuts on the abutting surface through the brakemember 27. The abutting surface is concave to form a groove forreceiving the bending piece 2321; alternatively, the abutting surface isa flat surface. The abutting surface is not limited to theabove-mentioned embodiments, as long as the abutting surface abutsagainst the bending piece 2321.

The driving rod 26 is provided with a latching groove 263, and the brakemember 27 is provided with a latching block 271 cooperated with thelatching groove 263 in a latching mode. In this embodiment, the brakemember 27 is M-shaped, and inward bending pieces of the M-shaped brakemember 27 are provided with the latching blocks 271. Both sides of oneend of the driving rod 26 are provided with the latching grooves 263.The M-shaped brake member 27 fastens the driving rod 26 and theclip-cartridge slot 232 after the latching blocks 271 slide into thelatching grooves 263.

The clip-pushing forcing member includes a positioning block 24, aconnecting assembly 25 connected to the positioning block 24, and adriving assembly 28 connected to the connecting assembly 25. The drivingassembly 28 drives and pushes the connecting assembly 25 so as to drivethe positioning block 24 to move.

The positioning block 24 is arranged in the inner cavity 11. The drivingrod 26 is provided with a clamping part, and the positioning block 24cooperates with the clamping part to restrict the driving rod 26 frommoving towards the clamp 3. The driving rod 26 includes a main body part261 and a bending part 262 bent outwards from a side of the main bodypart 261. The clamping part includes a latching hook 2621 arranged onthe bending part 262 and a first bump 2611 arranged on the main bodypart 261. The positioning block 24 is arranged between the latching hook2621 and the first bump 2611. The positioning block 24 is provided witha first through hole allowing the clip-cartridge assembly 23 to enterthe receiving cavity 22, and the latching hook 2621 passes through thefirst through hole to abut against the positioning block 24. Thelatching hook 2621 is of a slope structure. The slope structure has aninclined plane and a vertical plane connected to the inclined plane, andthe vertical plane is clamped with the positioning block 24. Taking thedirection of arrow “a” in the figure as the front side, the slopestructure inclines upwards from the front side to the rear side. Theslope structure passes through the first through hole under thecompression of the first through hole, and then elastically recovers toabut against the positioning block 24. In this embodiment, the firstbump 2611 and the latching hook 2621 are arranged in different planes tobetter fix the clip-cartridge assembly 23. Of course, in otherembodiments, the first bump 2611 and the latching hook 2621 may also bearranged in the same plane, which is not limited here.

The medical apparatus further includes a limiting member. The limitingmember is configured for preventing the clip-cartridge assembly 23and/or the driving assembly 28 from exceeding the stroke range.

The limiting member includes a first stopper, a second stopper 43 and asecond bump 2322. The first stopper is disposed on the casing 10 at aside of the inner cavity 11, and the first stopper abuts against an endof the clip-cartridge assembly 23 to restrict the clip-cartridgeassembly 23 from moving towards the handle 1. The second stopper 43 isdisposed in the inner cavity 11. The second bump 2322 is disposed on theclip-cartridge slot 232 and clamped with the second stopper 43. Thesecond bump 2322 is located between the first stopper and the secondstopper 43. The second stopper 43 is clamped with the second bump 2322to restrict the movement of the clip-cartridge assembly 23 towards theclamp 3. The arrangement of the first stopper, the second stopper 43 aswell as the second bump 2322 forms the first positional limitingprotection for the clip-cartridge assembly 23. When an end of theclip-cartridge assembly 23 abuts against the first stopper or the secondbump 2322 abuts against the second stopper 43, the medical apparatusstops working.

The limiting member includes a threaded rod 285 arranged on the drivingassembly 28. The threaded rod 285 is connected to the clip-cartridgeassembly 23 through the connecting assembly 25. The threaded rod 285 isin threaded connection with the connecting assembly 25. The drivingassembly 28 drives the threaded rod 285 to push the connecting assembly25 so as to drive the clip-cartridge assembly 23 to feed clips. When thedriving assembly 28 drives the threaded rod 285 beyond the stroke range,the medical apparatus stops working. The driving assembly 28 is disposedin the handle 1. The driving assembly 28 further includes a drivingmotor 281, a first gear 282 connected to the driving motor 281, a secondgear 283 engaged with the first gear 282 along a vertical direction, anda nut 284 connected to the second gear 283. The nut 284 is sleeved withthe second gear 283. The driving motor 281 is provided with an outputshaft, and the output shaft is sleeved with the first gear 282. Theoutput shaft transmits the speed and torque output from the drivingmotor 281 to the first gear 282 and the second gear 283, such that theradial rotation is converted into axial rotation. The driving assembly28 is in threaded connection with the connecting assembly 25 through thethreaded rod 285. The limitation on the length of the threaded rod 285serves as a third positional limiting protection for the medicalapparatus.

The limiting member includes an electronic switch arranged on theclip-cartridge assembly 23, and a receiver arranged in the inner cavity11 and coupled with the electronic switch. The electronic switchcooperates with the receiver to form a second positional limitingprotection for the clip-cartridge assembly 23. When the receiverreceives a signal from the electronic switch, the medical apparatusstops working. In this embodiment, the limiting member includes twoelectronic switches, namely, a first electronic switch and a secondelectronic switch. The first electronic switch and the second electronicswitch are arranged on the two sides of the clip-cartridge assembly 23to prevent the clip-cartridge assembly 23 from exceeding the strokerange. The electronic switches are conventional position switches, whichare not described in detail here. The electronic switches may also bearranged on the connecting assembly 25 and/or the positioning block 24,which is determined according to actual application requirements and notspecifically limited here.

Depending on the specific situation, the above-mentioned threepositional limiting protections may be arbitrarily combined with oneanother.

The connecting assembly 25 includes a connecting piece 251 and aconnecting rod 252. The connecting rod 252 connects the connecting piece251 and the positioning block 24. The threaded rod 285 is connected tothe connecting piece 251. The driving assembly 28 drives the threadedrod 285 to move forwards, so that the connecting piece 251 drives thepositioning block 24 to move, thereby driving the clip-cartridgeassembly 23 to move towards the clamp 3. The connecting piece 251 isprovided with a second through hole and a three through hole. Thethreaded rod 285 is in threaded connection with the third through hole,and the clip-cartridge assembly 23 passes through the second throughhole to enter the receiving cavity 22. Of course, the connectingassembly 25 may further include a connecting sleeve 253, and theconnecting sleeve 253 is sleeved with the connecting piece 251. In thiscase, the connecting rod 252 connects the connecting sleeve 253 and thepositioning block 24.

The firing forcing member includes a toggle piece 41 and a movablemember 42. The toggle piece 41 has a first connecting part, a secondconnecting part, and a third connecting part. The first connecting partis axially connected to the casing 10, the second connecting part isconnected to the connecting rod 252, and the third connecting part isconnected to the movable member 42. The positioning block 24 is clampedwith the toggle piece 41. In this embodiment, the first connecting part,the second connecting part and the third connecting part form a shape oftriangle, which can better drive the firing rod 21 to move forwards orbackwards in a situation that the toggle piece 41 leans forwards orbackwards. When the positioning block 24 moves forwards, the togglepiece 41 rotates towards the clamp 3 through the first connecting part,so as to drive the firing rod 21 to open the clamp 3. When thepositioning block 24 moves backwards, the toggle piece 41 rotatestowards the handle 1 through the first connecting part, so as to drivethe firing rod 21 to close the clamp 3. A guide groove is formed in thecasing 10, and the movable member 42 is disposed in the guide groove.The movable member 42 includes a spring 421 and a spring rod 422. Thespring 421 is fixedly arranged in the guide groove and configured forrestoring the toggle piece 41. The spring rod 422 is arranged in thespring 421. One end of the spring rod 422 is connected to the togglepiece 41, and the other end of the spring rod 422 abuts against thespring 421. When the positioning block 24 moves backwards, the togglepiece 41 presses backwards to deform the spring 421. When thepositioning block 24 moves forwards, the spring 421 drives the togglepiece 41 to recover by using the elastic force in itself.

Of course, in other embodiments, the firing forcing member may be afiring handle, and the firing handle is directly connected to the firingrod 21 to drive the firing rod 21 to achieve a firing action, which isnot limited here.

The medical apparatus further includes a rotating handle 4 configuredfor connecting the handle 1 with the work head 2. The angle of the clamp3 can be regulated by adjusting the rotating handle 4, thereby reducingthe difficulty of adjusting the angle of the clamp 3 due to anglelimitation during operation. In this embodiment, the second stopper 43and the guide groove are both disposed on the rotating handle 4.

The handle 1 includes a shell 16, a control circuit arranged in theshell 16, a first switch 14 and a second switch 15; the first switch 14and the second switch 15 are coupled to the control circuit. The firstswitch 14 is configured for driving the driving rod 26 and the firingrod 21 to move forwards. The second switch 15 is configured for drivingthe driving rod 26 and the firing rod 21 to move backwards. The drivingassembly 28 is coupled to the control circuit. The handle 1 furtherincludes a battery coupled to the control circuit and a display disposedon the handle 1.

A control module for the driving assembly 28, a work-head identificationmodule, a stroke control module for clip-cartridge feeding and firing, abattery detection-control module, a machine working-state indicationmodule, and a data recording-storage module are disposed in the controlcircuit and are controlled by a single chip processor.

Herein, the control module for the driving assembly 28 is configured forcontrolling the start and stop of the threaded rod 285. The first switch14 and the second switch 15 arranged under the handle 1 are isolatedfrom the interior of a host of a clip applicator. The driving assembly28 is controlled by moving magnets inside the first switch 14 and thesecond switch 15 close to or away from a Hall switch sealed in thehandle 1.

The identification module for work head 2 is configured for transmittingthe type data of the work head 2 through a terminal arranged on thereceiving cavity 22, and then instructing the control circuit to callcorresponding working programs.

The stroke control module for clip-cartridge feeding and firing realizesclip feeding and clip firing actions by means of a signal identificationmodule, an electronic switch position control module and a safety moduleinstalled in the work head 2.

The battery detection module in the battery detection-control module hasa function for detecting the battery power and monitors the batterypower before and during the surgical operation, in order to ensure thatthe battery power can meet the surgical operation requirements or allowtimely battery replacement.

The working-state indication module is configure for displaying thebattery power, the connection state of the work head 2, the clip feedingcompletion state and the firing completion state by using a display.

The working process of the medical apparatus provided by the presentdisclosure is as follows: when the first switch 14 is pressed, thedriving assembly 28 drives the driving rod 26 through the threaded rod285 to push the clip-pushing piece 233 forwards, until the ligationclips 231 are pushed into the clamp 3. At the same time, the firing rod21 moves forwards, so that the clamp 3 is in an open state. Then, thesecond switch 15 is pressed, the driving assembly 28 drives the drivingrod 26 through the threaded rod 285 to drive the clip-pushing piece 233to move backwards, and the firing rod 21 moves backwards at the sametime, so that the clamp 3 is closed to ligate the target tissue.

To sum up, by forming the opening 12 in the casing 10, theclip-cartridge assembly 23 can enter or exit the cavity through theopening 12 to deliver the ligation clips 231 to the clamp 3. In thisway, the clip-cartridge assembly 23 can be replaceable, and the clamp 3,the work head 2 and the handle 1 can be reused, thereby achieving thepurpose of saving costs.

By placing the plurality of ligation clips 231 in the clip-cartridgeassembly 23 and delivering the ligation clips to the clamp 3, theproblems of inconvenient use and the increased operational risk inexisting apparatuses caused by being incapable of successive feeding theligation clips are solved.

By constructing the plurality of limiting protections, the safety factorof the medical apparatus is relatively much higher, thus the probabilityof failure due to a single fault is effectively reduced.

By allowing the positioning block 24 to be clamped with the toggle piece41, the firing rod 21 is driven to move forwards or backwards so as tocontrol the opening or closing of the clamp 3; in this way, the firingrod 21, the clamp 3, and the clip-cartridge assembly 23 can be operatedsimultaneously without the need to be operated separately andindividually, thereby achieving the purposes of structuresimplification, quick firing and efficiency improvement.

The technical features of above-mentioned embodiments can be arbitrarilycombined with one another. In order to make the description concise, allpossible combinations of the technical features in above-mentionedembodiments are not described. However, as long as no contradictionexists in the combinations of these technical features, they should beconsidered as part of the disclosure in the present disclosure.

The above-mentioned embodiments only represent several exemplaryimplementation of the present disclosure; although the embodiments aredescribed in a specific and detailed way, but they cannot be understoodas limiting the protection scope of the present disclosure. It should bepointed out that, several modifications and improvements can be made forthose ordinary skilled in the art without departing from the concept ofthe present disclosure, the modifications and improvements belong to theprotection scope of the present disclosure. Accordingly, the protectionscope of the present disclosure shall be defined by the accompanyingclaims.

1. A medical apparatus, comprising a clamp, a work head and a handle,wherein the work head is connected to the clamp and the handle, and thework head comprises a casing, a firing forcing member arranged in thecasing, a firing rod connected to the firing forcing member, a receivingcavity arranged at a side of the firing rod, and a clip-cartridgeassembly, the clip-cartridge assembly being arranged in the receivingcavity and configured for delivering ligation clips to the clamp; aninner cavity communicating with the receiving cavity is formed in thecasing; the firing rod is connected to the firing forcing member and theclamp respectively, and the firing forcing member drives the firing rodto move so as to open or close the clamp; and the medical apparatusfurther comprises a limiting member, the limiting member beingconfigured for preventing at least one of the clip-cartridge assemblyand a driving assembly from exceeding a stroke range.
 2. The medicalapparatus according to claim 1, wherein the limiting member comprises athreaded rod arranged on the driving assembly, the threaded rod isconnected to the clip-cartridge assembly through a connecting piece, andthe threaded rod is in threaded connection with the connecting piece;and the driving assembly drives the threaded rod to push the connectingpiece so as to drive the clip-cartridge assembly to feed; in conditionthat the driving assembly drives the threaded rod beyond the strokerange, the medical apparatus stops working.
 3. The medical apparatusaccording to claim 1, wherein the limiting member comprises anelectronic switch arranged on the clip-cartridge assembly and areceiver, the receiver is arranged in the inner cavity and coupled withthe electronic switch; in condition that the receiver receives a signalfrom the electronic switch, the medical apparatus stops working.
 4. Themedical apparatus according to claim 1, wherein the limiting membercomprises a first stopper disposed on the casing at a side of the innercavity, a second stopper disposed in the inner cavity, and a secondbump; the second bump is disposed on the clip-cartridge assembly andclamped with the second stopper; the second bump is located between thefirst stopper and the second stopper; in condition that an end of theclip-cartridge assembly abuts against the first stopper or the secondbump abuts against the second stopper, the medical apparatus stopsworking.
 5. The medical apparatus according to claim 1, wherein theclip-cartridge assembly comprises the ligation clips, a clip-cartridgeslot configured for accommodating the ligation clips, and a clip-pushingpiece covering the clip-cartridge slot; the clip-pushing piece isprovided with a plurality of ratchet facing towards the clamp, and theratchet abut against the ligation clips to push the ligation clips tomove towards the clamp under driving of a driving rod.
 6. The medicalapparatus according to claim 5, wherein the medical apparatus furthercomprises a driving rod arranged on the clip-cartridge assembly to pushthe clip-pushing piece to move, a clip-pushing forcing member isarranged on the handle, and the clip-pushing forcing member is connectedto the driving rod and drive the driving rod to push the clip-pushingpiece to move.
 7. The medical apparatus according to claim 6, wherein apositioning block is arranged in the inner cavity, the driving rod isprovided with a clamping part, and the positioning block cooperates withthe clamping part to restrict the driving rod from moving towards theclamp.
 8. The medical apparatus according to claim 7, wherein thedriving rod comprises a main body part and a bending part bent outwardsfrom a side of the main body part, the clamping part comprises alatching hook arranged on the bending part and a first bump arranged onthe main body part, and the positioning block is arranged between thelatching hook and the first bump.
 9. The medical apparatus according toclaim 8, wherein the firing forcing member comprises a toggle piece anda movable member, and the toggle piece has a first connecting part, asecond connecting part, and a third connecting part; the firstconnecting part is axially connected to the casing, the secondconnecting part is connected to the connecting rod, the third connectingpart is connected to the movable member; the positioning block isclamped with the toggle piece; and in condition that the positioningblock moves forwards, the toggle piece rotates towards the clamp throughthe first connecting part to drive the firing rod to control the clampto open; and in condition that the positioning block moves backwards,the toggle piece rotates towards the handle through the first connectingpart to drive the firing rod to control the clamp to close.
 10. Themedical apparatus according to claim 9, wherein a guide groove is formedin the casing, and the movable member is disposed in the guide groove.11. The medical apparatus according to claim 10, wherein the movablemember comprises a spring and a spring rod, the spring is fixedlyarranged in the guide groove and configured for restoring the togglepiece, the spring rod is arranged in the spring; and an end of thespring rod is connected to the toggle piece, and the other end of thespring rod abuts against the spring.
 12. The medical apparatus accordingto claim 2, wherein the clip-cartridge assembly comprises the ligationclips, a clip-cartridge slot configured for accommodating the ligationclips, and a clip-pushing piece covering the clip-cartridge slot; theclip-pushing piece is provided with a plurality of ratchet facingtowards the clamp, and the ratchet abut against the ligation clips topush the ligation clips to move towards the clamp under driving of the adriving rod.
 13. The medical apparatus according to claim 3, wherein theclip-cartridge assembly comprises the ligation clips, a clip-cartridgeslot configured for accommodating the ligation clips, and a clip-pushingpiece covering the clip-cartridge slot; the clip-pushing piece isprovided with a plurality of ratchet facing towards the clamp, and theratchet abut against the ligation clips to push the ligation clips tomove towards the clamp under driving of the a driving rod.
 14. Themedical apparatus according to claim 4, wherein the clip-cartridgeassembly comprises the ligation clips, a clip-cartridge slot configuredfor accommodating the ligation clips, and a clip-pushing piece coveringthe clip-cartridge slot; the clip-pushing piece is provided with aplurality of ratchet facing towards the clamp, and the ratchet abutagainst the ligation clips to push the ligation clips to move towardsthe clamp under driving of the a driving rod.
 15. The medical apparatusaccording to claim 6, wherein a side of the clip-cartridge slot isprovided with a bending piece, the driving rod has an abutting surfacefacing away from the clamp, and the bending piece abuts on the abuttingsurface through the brake member.
 16. The medical apparatus according toclaim 15, wherein the abutting surface is concave to form a groove forreceiving the bending piece.
 17. The medical apparatus according toclaim 16, wherein a brake member is detachably arranged between thedriving rod and the clip-cartridge assembly to limit relative movementbetween the driving rod and the clip-cartridge assembly.
 18. The medicalapparatus according to claim 17, wherein the driving rod is providedwith a latching groove, and the brake member is provided with a latchingblock cooperated with the latching groove in a latching mode.